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Introduction: The general objective was to determine the epidemiological, clinical, paraclinical, therapeutic and evolutionary aspects of connectivitis in the dermatology department of the CHU Aristide Le Dantec. Patients and methods: This was a retrospective and descriptive study conducted in the Dermatology Department of the University Hospital Center (UHC) Aristide Le Dantec (HALD) of Dakar between January 2009 and December 2019. Their diagnoses were retained according to the international criteria validated in the course of connectivites Results: We identified 290 cases of connectivitis. Systemic scleroderma was the most frequent in 34.42% (n=94), followed by systemic lupus in 25.86% (n=75), mixed connectivities in 22,06% (n=64) and dermatomyositis in 19,32% (n=56). Cancer was associated with dermatomyositis in 11 cases and with systemic scleroderma in 3 cases. The mean age of our patients was 38.23 years. The sex ratio was 4.2 and the mean duration of evolution was 25 months. Dermatological manifestations were constant, found in all patients. In systemic lupus, they were dominated by discoid lupus lesions found in 40% and hypochromic spots (86%) in systemic scleroderma. In dermatomyositis, skin lesions were dominated by periorbital erythroedema (66.07%). Joint manifestations were found in 56.89% of cases (n= 165), muscular manifestations in 41.37% of cases (n= 120) and pleuropulmonary manifestations in 31.3% of cases (n=91). Neuropsychiatric manifestations were noted in 5.17% of cases (n=15). All our patients were treated with corticosteroid therapy and 12.06% of them had received immunosuppressive treatment, the most commonly used molecules being methotrexate (3.44%) and cyclophosphamide (8.27%). Hydroxychloroquine was prescribed in 59.31% of patients, while D-penicillamine was prescribed in 42.06% of patients, 100% of whom were treated for systemic scleroderma. The main complications encountered were infectious complications in 83 cases (28.6%). Visceral complications, a type of visceral insufficiency, were noted in 4.13% of cases. Conclusion: Our study demonstrates the frequency of connectivitis in the dermatology department. Its particularity was the predominance of systemic scleroderma over lupus which was classically the first connectivite in dermatology services. The delay in diagnosis noted is correlated with visceral attacks; hence the importance of a better knowledge of these affections for an early management.

La maladie de Behcet est une affection rare, systemique, d’etiologie inconnue et d’allure polymorphe. L’objectif de cette etude est de decrire les aspects epidemiologiques, cliniques et therapeutiques de la maladie de Behcet au Senegal mais aussi de preciser le role de l’odontologiste dans le diagnostic et la prise en charge de cette affection. Les dossiers de patients ont ete selectionnes selon les criteres diagnostiques du Groupe International d’Etude de la Maladie de Behcet, dans le service de Dermatologie du CHU Aristide Le Dantec de Dakar, entre decembre 1997 et mars 2006. 12 cas (8 hommes, 4 femmes) de maladie de Behcet, chez des sujets de race noire, âges de 18 a 54 ans, ont ete colliges. Les aphtes buccaux, sans caracteres particuliers, etaient constants ; ils realisaient une aphtose bipolaire dans 11 cas. Ces lesions buccales pouvaient avoir un caractere inaugural (n = 2) et contribuer a motiver la consultation (n =10). Les principales manifestations systemiques etaient oculaires (n = 8), articulaires et cutanees (n = 6 pour chacune des localisations). La maladie de Behcet chez les patients senegalais est classique : elle se caracterise par la presence constante des aphtes buccaux, souvent associes a des aphtes genitaux (aphtose bipolaire) et a une uveite anterieure. (Med Buccale Chir Buccale 2009 ; 15 : 183-188).